Mixtures 10-7-2015

Table of Contents 2nd 6 Weeks Date Description Page 10/5 Differences between Elements & Compounds 25 -26 10/6 Mixtures 28

Mixtures A mixture is a combination of 2 or more substances that are not chemically combined.

Examples of Mixtures Properties of Mixtures: chicken noodle soup salad pizza – yes, that would be Yoda… Properties of Mixtures: Each substance in a mixture keeps its identity You can physically separate them They also contain elements, compounds, or both And they can be formed using any ratio of components

Mixtures may be homogeneous or heterogeneous The prefix “homo” indicates the same Homogeneous mixtures have the same appearance and properties throughout the mixture The prefix “hetero” indicates difference Heterogeneous mixtures consist of visibly different substances

There are THREE types of mixtures: Solutions Suspensions Colloids

Solutions A solution is a mixture that appears to be a single substance, but it is actually composed of 2 or more substances that are distributed evenly amongst each other. SOLUTIONS ARE HOMOGENEOUS sugar & Kool-Aid powder are dissolved in water carbon dioxide is dissolved in water salt is dissolved in water

Suspensions A suspension is a mixture in which particles of a material are dispersed throughout a liquid or gas, but are large enough that they settle out. SUSPENSIONS ARE HETEROGENEOUS That water is disgusting! muddy water Italian dressing

Colloids A colloid is a mixture in which the particles are dispersed throughout but are not heavy enough to settle out. COLLOIDS ARE HOMOGENEOUS Colloids have properties of both solutions & suspensions. mayonnaise milk

Exit Slip: Identify the following with as many terms as apply Exit Slip: Identify the following with as many terms as apply. (Add to page 27) Example: A) Kool-aid – mixture – solution – homogeneous B) Copper - element Mixture Element Compound Suspension Colloid Solution Homogeneous Heterogeneous Table salt Salad Mayonnaise Italian dressing Pepsi Oxygen Hydrogen Water

Elements Compounds Mixtures Homework: Comparing Elements, Compounds & Mixtures Using your notes complete the following questions. We will go over this tomorrow. Elements Compounds Mixtures What are they made up of? Can they be broken down? If yes, how? Do they keep or lose their original properties? Draw what the particles look like.